Home / 1,545.62-2,131.97-985.88

Finding the Fourth Proportional to 1,545.62, 2,131.97 and 985.88

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Solution

The fourth proportional to 1,545.62, 2,131.97 and 985.88 is: 1,359.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.62 : 2,131.97 = 985.88 : x
  2. Step 2: Convert to fraction form
    1,545.62/2,131.97 = 985.88/x
  3. Step 3: Cross multiply
    1,545.62x = 2,131.97 × 985.88
  4. Step 4: Simplify right side
    1,545.62x = 2,101,850.99
  5. Step 5: Solve for x
    x = 2,101,850.99/1,545.62
  6. Step 6: Final answer
    x = 1,359.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.